+ if ($longurl = common_longurl($uri)) {
+ $longurl = htmlentities($longurl, ENT_QUOTES, 'UTF-8');
+ $title = " title='$longurl'";
+ }
+ else $title = '';
+
+ return '<a href="' . $uri . '"' . $title . ' class="extlink">' . $uri . '</a>' . $trailer;
+}
+
+function common_longurl($uri) {
+ $uri_e = urlencode($uri);
+ $longurl = unserialize(file_get_contents("http://api.longurl.org/v1/expand?format=php&url=$uri_e"));
+ if (empty($longurl['long_url']) || $uri === $longurl['long_url']) return false;
+ return stripslashes($longurl['long_url']);
+}
+
+function common_shorten_links($text) {
+ // \s = not a horizontal whitespace character (since PHP 5.2.4)
+ // RYM this should prevent * preceded URLs from being processed but it its a char
+// $r = preg_replace('@[^*](https?://[^)\]>\s]+)@e', "common_shorten_link('\\1')", $r);
+ return preg_replace('@https?://[^)\]>\s]+@e', "common_shorten_link('\\0')", $text);
+}
+
+function common_shorten_link($long_url) {
+
+ $user = common_current_user();
+
+ $curlh = curl_init();
+ curl_setopt($curlh, CURLOPT_CONNECTTIMEOUT, 20); // # seconds to wait
+ curl_setopt($curlh, CURLOPT_USERAGENT, 'Laconica');
+ curl_setopt($curlh, CURLOPT_RETURNTRANSFER, true);
+
+ switch($user->urlshorteningservice) {
+ case 'ur1.ca':
+ $short_url_service = new LilUrl;
+ $short_url = $short_url_service->shorten($long_url);
+ break;
+
+ case '2tu.us':
+ $short_url_service = new TightUrl;
+ $short_url = $short_url_service->shorten($long_url);
+ break;
+
+ case 'ptiturl.com':
+ $short_url_service = new PtitUrl;
+ $short_url = $short_url_service->shorten($long_url);
+ break;
+
+ case 'bit.ly':
+ curl_setopt($curlh, CURLOPT_URL, 'http://bit.ly/api?method=shorten&long_url='.urlencode($long_url));
+ $short_url = current(json_decode(curl_exec($curlh))->results)->hashUrl;
+ break;
+
+ case 'is.gd':
+ curl_setopt($curlh, CURLOPT_URL, 'http://is.gd/api.php?longurl='.urlencode($long_url));
+ $short_url = curl_exec($curlh);
+ break;
+ case 'snipr.com':
+ curl_setopt($curlh, CURLOPT_URL, 'http://snipr.com/site/snip?r=simple&link='.urlencode($long_url));
+ $short_url = curl_exec($curlh);
+ break;
+ case 'metamark.net':
+ curl_setopt($curlh, CURLOPT_URL, 'http://metamark.net/api/rest/simple?long_url='.urlencode($long_url));
+ $short_url = curl_exec($curlh);
+ break;
+ case 'tinyurl.com':
+ curl_setopt($curlh, CURLOPT_URL, 'http://tinyurl.com/api-create.php?url='.urlencode($long_url));
+ $short_url = curl_exec($curlh);
+ break;
+ default:
+ $short_url = false;
+ }
+
+ curl_close($curlh);
+
+ if ($short_url) {
+ return $short_url;
+ }
+ return $long_url;
+}
+
+function common_xml_safe_str($str) {
+ $xmlStr = htmlentities(iconv('UTF-8', 'UTF-8//IGNORE', $str), ENT_NOQUOTES, 'UTF-8');
+
+ // Replace control, formatting, and surrogate characters with '*', ala Twitter
+ return preg_replace('/[\p{Cc}\p{Cf}\p{Cs}]/u', '*', $str);
+}
+
+function common_tag_link($tag) {
+ $canonical = common_canonical_tag($tag);
+ $url = common_local_url('tag', array('tag' => $canonical));
+ return '<a href="' . htmlspecialchars($url) . '" rel="tag" class="hashlink">' . htmlspecialchars($tag) . '</a>';
+}
+
+function common_canonical_tag($tag) {
+ return strtolower(str_replace(array('-', '_', '.'), '', $tag));
+}
+
+function common_valid_profile_tag($str) {
+ return preg_match('/^[A-Za-z0-9_\-\.]{1,64}$/', $str);